Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
cau treo » cau theo, cau tren, cau triet
tham soc » cham soc, tham nuoc, thai son
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va
te sac » te sach, te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang xa hoi. ((hieu quan) or (hieu qua)) tham soc va hanh vi ((luu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang xa hoi. ((hieu quan) OR (hieu qua)) tham soc va hanh vi ((luu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sac ky tang xa hoi. ((hieu quan) or (hieu qua)) tham soc va hanh vi ((luu tre) or (cau treo))*.